I know this web-program is for research purpose only

Notice: Recently, our register error system becomes too sensitive to unstable internet connection. If you get some warning like "this email or user name has been used" but you are sure it has not, just go ahead to use what you input to "Your prefered account" and "Your password" as username and pwd to login. If still not work, ask maintainer (ningdaliang@ou.edu) for help.